ESP32 Lora V2 help me for the thesis

#1

Hi everyone. I’ve purchased a pair of heltec esp32 lora recently, when im testing it we have an error
esptool.py v3.0-dev
File “esptool.py”, line 3682, in
Serial port COM3
File “esptool.py”, line 3675, in main
File “esptool.py”, line 3329, in main
File “esptool.py”, line 263, in init
File "site-packages\serial_init.py", line 88, in serial_for_url
File “site-packages\serial\serialwin32.py”, line 62, in open
serial.serialutil.SerialException: could not open port ‘COM3’: WindowsError(121, ‘The semaphore timeout period has expired.’)
Failed to execute script esptool
the selected serial port Failed to execute script esptool
does not exist or your board is not connected

#2

The new development board needs to be updated to the latest Arduino environment before it can be used.

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